Lenovo ThinkPad T420 4236 User Manual page 157

5. If a tool for removing connectors is included in the package with the new card, use it to disconnect the
cables from the card. If no such tool is included, disconnect the cables by picking up the connectors
with your fingers and gently unplugging them.
6. Remove the screw (1). The card pops up (2).
Note: Depending on the system configuration of your computer, the card may have only one connector.
.
Chapter 6 Replacing devices
139